package Functii.Trigonometrice;
import Functii.*;
import Operator.*;

public class Arctg extends Functie{

	public static double calcul(double aux1){
		return Math.atan(aux1);
	}
	
	public double calcul(){
		if (getfStang() == null)
			System.exit(1);
		return calcul(getfStang().calcul());
	}
	
	public String derivare(){
		if (getfStang() == null)
		System.exit(1);
				return Cat.concatTermens(getfStang().derivare(),"(1+" + getfStang().toString() + "^2)");
				}
	
	public double calculDerivata(){
		if (getfStang() == null)
		System.exit(1);
		return Cat.Calcul(getfStang().calculDerivata(), 1 + Math.pow(getfStang().calcul(), 2));
	}
	public String toString(){
		if (getfStang() == null)
			System.exit(1);
		return concatTermeni(getfStang().toString());
	}
	public static String concatTermens(String aux1){
		String aux;
		int nrP;
		nrP = aux1.charAt(0) == '(' ? 0 : 2;
		aux = "arctg";
		if (nrP != 0) aux += "(";
		aux += aux1;
		if (nrP != 0) aux += ")";
		return aux;
	}
	public String concatTermeni(String aux1){
		String aux;
		int nrP;
		nrP = aux1.charAt(0) == '(' ? 0 : 2;
		aux = "arctg";
		if (nrP != 0) aux += "(";
		aux += aux1;
		if (nrP != 0) aux += ")";
		return aux;
	}
	public double calculeazaValoare() {
		return this.calcul();
	}
}
